Machine for polishing or grinding glass knobs and similar articles



Nov. 3 1925.

.1. c. HOWELL MACHINE FOR POLISHING OR GRINDING GLASS, KNOBS AND SIMILAR ARTICLES Filed new. 1922 3 sheds-sheet 2 Nov. 3, 1925. 1,559,643

J. c. POWELL MACHINE FOR IOLISHING d-R GRINDING GLASS KNOBS AND SIMILAR ARTICLES Filed Dec. 1922 3 Sheets-Sheet 5 I gnmntoz L JCLPowell,

Patented Nov. 3, 1925.

UNITED STATES PATENT omen.

JAMES CHESTER, POWELL, or BYESVILLE, OHIO, ASSIGNOR 'rlo CAMBRIDGE rass oom- PANY, or CAMBRIDGE, OHIO. 4

Application filed December 7; 1922. Serial at. 605,422.

To all whom it may comma" Be it known that 1, JAMES CHESTER POWELL, citizen of the United States, residing v at Byesville, in the county of Guernsey and State of Ohio, have invented certain new and useful Improvements in Machines for Polishing or Grinding Glass Knobs and Similar Articles, of which the following is a specification This inventionrelates to certain new and useful improvements in machines for polishmachine of this character which can be used to polish or grind knobs or similar articles. by means of rotating wheels.-

vThe primary object ofthe invention is to provide a machine of this type which enables the knobs to be expeditiously polished or ground, and more particularly by the employment of a series of holders, which are continuously rotated and which, through the action of gravity, maintain the work against the polishing or grinding Wheel, the holders being independent of one anotherand being formed :to allow the work to be easily and quickly applied to and re moved therefrom during :the operation of the'machineQ A further object of the invention is to provide .a machine of this character wherein a single operator is enabled to successively load and unload the work holders as the polishing of the individualpieces of the work is completed so that the entire machine may he maintained :at full capacity through outtheoperation thereof and without st0p A still further object of the invention is to provide a machine wherein the holders :areimounted so as'to be easily and quickly moved into and out of grinding position so as to permit loading and unloading thereof.

The invention also aims to provide means for attaining the foregoing objects, which is of simple character and efficient in operation.

Figure 2, is a section on. line 2-2 of Figure 1;

Figure 3, is a 'section on line 3 3" 'o f- Figure 1, and s V V Figure 4, is an enlarged "sectional View on line 4.-'4t of Figure. 1. In proceeding. in accordance with the present invention, a frame is employed which embodies bases l having vertical standards 1 suitably secured thereto, and horizontal beams 2 secured to, the standards- :1; the latter having bearings l3, secuiid thereto in which a shaft dis journal'ed, the shaft Ca-fly ing a --sier.ies of grinding or polishin disks or wheels .5. jThe, shaft 4c is, rovide d with a pulley G'Which drives a heft 7, the nae: being trained over a pulley 8 mounted on a shaftfl, the shaft being journaled in bearings 12 mounted .on the upper beam 2 and beingprovided with a pulley l O'engaged by a belt 11, the belt 11 driving a shaft 11 which latter is mounted. in a tank 3:3, having a raised back 34. Shaft 11 carries a series of brushes 50, which revolve and dip into a mixtiuie of polishing material or agent .contained in tank 33, and brush the material onto the cork wheel peripheries when cork Wheels are employed, thus maintaining the wheels covered with the polishing agent. vShaft i is driven by apulley ,51 which latter is operated from any suitable source of power. v

The beams 2 have .tWo series of bearings 13 and 14 secured thereto, the hearings being vertically alined and spaced and slidably supporting :a series of vertical shafts 15, which latter have key-ways 16 extending axially thereof. able on the shafts 15 and have keys 18 engaging .in the key ways 16 so as to eifeot driving of the shafts 15, upon rotation of the gears: The gears 17 rotate uponthe upper horizontal beam 2 and are held against downward -moyement thereby and are driven ,by means of interposed gears 19' Gear's I'Tare freely slid In the present illustrated machine there are eight shafts disclosed, arranged intwo groups of four each for conven ence of operation. All of the shafts are rotated in unisonand in the same direction and ad .colidinglz the first shaft of eaeh groupis equippe with a worm gear designated 20 and 21 respectively, and slidably keyed to the shafts 15. The shaft 9 has worms 22 and 23 fixedly secured thereto which are in mesh with and drive the worm gears 20 and 21.

The lower ends of the shafts 15 are equipped with work holders or chucks 24:, which are in the form of inverted cups, or sockets. The work holders or chucks are threadedly connected to the shafts and are interiorly provided or lined with sleeves 25 preferably of rubber, or other flexible means capable of frictionally gripping and holding the glass door or other knobs during pol ishing thereof. The nature of the lining or work gripping means 25 is such that the glass knobs may be easily and quickly inserted in and removed from the chucks by the expenditure of relatively slight force. F or the purpose of enabling the work holders or chucks to be individually or independently loaded and unloaded and without disturbing the grinding or polishing action of the wheels on the work in the remaining holders or chucks and to thus enable the machine to continuously and uninterruptedly function, means is provided to enable the work holders to be raised up Wardly from the various grinding wheels which embodies chains 26 swivelly connected at 27 to rods 28 that are threadedly connected to the shafts 15. The chains are trained over pulleys 29 afliXed to a suitable overhead support 30 and are equipped with hand grips 31, and by grasping the latter, the operator may raise the shafts 15 and thereby the work holders 2i up from the grinding wheels to permit of loading and unloading of the holders. In order to limit downward movement of the shafts and also the extent of grinding of the outer faces of the door knobs, the shafts are provided with fixed collars 32 which engage the bearings l3.

In operation, power applied to the pulley 51 drives belt 7 and belt 11 and thereby 32 orthe engagement of the knobs D with the grinding wheels 5. When the outer faces of the knobs are completely ground or polished, the stops 32 will engage the bearings 18, and prevent further grinding or polishing, by holding the shafts against furtherdownward movement. From the foregoing it will be seen that the operator can readily observe the completion ofthe pol- 7 ishing action on all of the knobs and upon and uninterruptedly maintain the machinein operation and at substantially full capacity.

The work holders are continuously rotated so that the entire areas of the outer faces of the knobsare ground or polished, the holders not only being selectively and independently movable to permit loading and unloading thereof, but are also automatically restored to grinding position upon loading and release of the handles 31.

The wheels. 5 when used for polishing are of cork, and for grinding purposes are replaced by stone wheels, sothat the same machine can be used for either purpose by changing the wheels. When stone wheels are used, belt 11 is disconnected from the in Figure 3 are employed to wet the stone wheels. The drawings illustrate grinding or stone wheels.

What is claimed is shaft 11", and water nozzles 52 as indicated 1. In a polishing machine, a frame, a series of rotatable abrasive members carried by the frame, two series of vertical slidable and spaced shafts carried by the frame, means to slide the shafts, work holders carried by the shafts, a gear on each shaft, gears mounted on the frame in the'spaces between the shafts of each series and meshed with the gears of the shafts, a second gear on one shaft of each series of shafts, a horizontal shaft, a pair of gears on the horizontal shaft meshed with the respective second gears of the said two shafts, and means to drive the horizontal shaft.

2. In a polishing machine, a frame, a series of abrasive members rotatably carried bythe frame, an upper and a lower horizontal member on the frame disposed above the abrasive members, two series of vertical shafts, j ournaled in the horizontal members, work holders carried by the shafts, a stop on each shaft engageable with the upper face of the journals of thelower horizontal member to limit downward movement of the shafts, a gear slidably keyed on each shaft and rotatably seated upon the upper face of the journals of the upper horizontal member, gears journaled between the journals of the upper horizontal member and interposed in the spaces between adjacent shafts and intermeshing with the adjacent gears of the shafts of each series, a horizontal shaft journaled on the upper horizontal member and having a pair of worms thereon meshing with one of the gears on the respective series of shafts, and means to efieci; sliding of the shafts.

3. In a polishing machine, a frame, a series ofabrasive members, rotatably carried by .the frame, an upper and a lower horizontal member on the frame disposed above the abrasive members; vertical shafts journalled in the horizontal members, work holders carried by the shafts, a stop on each shaft engageable with the upper face of the journal of the lower horizontal member to limit downward movement of the shafts, a

gear slidably keyed on each shaft and rotatably seated upon the upper face of the 10 gears, driving means for one of the shafts, II

and means to effect sliding of the shafts.

In testimon whereof I aflix my signature.

JA s CHESTER POWELL. 

